The initiative, which was launched in response to Seattle’s recently approved sugary drinks tax, does not repeal previously passed soda taxes. However, Seattle will not be able to increase its tax or adjust it for inflation.

The initiative also takes aim at future grocery taxes that could come in the form of a locally determined “privilege tax,” although supporters acknowledge they do not know of any municipalities considering a tax on basic groceries.

I-1634 raised over $20 million, most of which came from major soda companies. Top donors include The Coca-Cola Co. with more than $9.6 million, PepsiCo, Inc. with nearly $7.3 million and Dr. Pepper Snapple Group, Inc. with more than $3 million.